Не срабатывает колбек OnPlayerTakeDamage

[SlimX]

Не срабатывает колбек OnPlayerTakeDamage, с чем может быть связано?

public OnPlayerTakeDamage(playerid, issuerid, Float:amount, weaponid, bodypart)
{
	if(issuerid != INVALID_PLAYER_ID)
        {
                if(19 <= weaponid <= 34 || weaponid == 38)
                {
			format(zcmd, sizeof(zcmd), "bodypartid %d", bodypart);
			SendClientMessage(playerid, -1, zcmd);
			SendClientMessage(issuerid, -1, zcmd);
		}
	}
	return true;
}